Is there evidence of space surrounding the BB singularity?
keepit said:At the BB did our universe include anything other than the singularity?
keepit said:... It seems to me that this universe might have started out infinitely large or at least extremely large.
keepit said:"at very high energy densities (approx uniform throughout space), quantum corrections can even make gravity repel".
Sorry to focus here on one small part of all that you said.
Anyhow, are you saying that these quantum corrections may have taken place at the start of the BB. (I hope I didn't miss your point here. I'm just an amateur.
marcus said:I certainly agree that it could have. I love the subject and follow parts of the research literature, but don't speak with any authority.
The model says that there was a classical universe AFAWK like ours in its basic physics, that collapsed in a crunch and instead of a "singularity" when it reached an extremely high density like 1% of Planck the quantum effects began being felt and slowed down the contraction, and at some point like 40% Planck density it turned around and rebounded.
It is with great reluctance then that I disagree with you and by association I suppose most of the Cosmology community. I do not believe, on dynamic grounds and all that I see around me in Nature, that before the Big Bang there was necessarily a classical universe like ours in basic physics.
If you're not an authority on cosmology, WHO IS?
keepit said:If you're not an authority on cosmology, WHO IS?
Carl Sagan said:"Arguments from authority carry little weight -- "authorities" have made mistakes in the past. They will do so again in the future. Perhaps a better way to say it is that in science there are no authorities; at most, there are experts."
The Big Bang singularity refers to the point in time where the universe is thought to have originated from a single, infinitely dense point.
While there is evidence of the Big Bang theory, there is currently no direct evidence of the singularity itself. However, the expansion of the universe and the cosmic microwave background radiation are considered indirect evidence of the singularity.
According to the Big Bang theory, there was no space surrounding the singularity at the moment of the Big Bang. The singularity is thought to have created space and time as it expanded.
No, we cannot observe the space surrounding the Big Bang singularity as it is beyond the observable universe. The singularity is thought to have expanded faster than the speed of light, making it impossible for us to see.
Yes, there are some alternative theories to the Big Bang singularity, such as the steady-state theory and the oscillating universe theory. However, these theories do not have as much evidence supporting them as the Big Bang theory.